Lock nut



AXY

Patented Dec. 9, 1947 gnam LOCK NUT Gustavo Vasquez Glumer, Mexico City,Mexico Application January 4, 1945, Serial No. 571,339 In MexicoFebruary 15, 1944 2Claim's. (Cl. 151-25) This invention relates tocertain useful improvements in eccentric wedges and split washers, to beused in connection with improved safety non-loosening nuts.

The invention aims to provide in a manner as hereinafter set forth, aneccentric wedge and an eccentric split washer of improved design andconstruction, to be used in connection with improved safetynon-loosening nuts, of the kind employed in mechanical structuressubject to major strains, vibrations or special safety conditions, assuch wedges and split washers of improved design, make impossible anyinvoluntary displacement of the same, thus not allowing any loosening ofthe nut in which these devices are being used, once said wedge or splitwasher have been locked in their working position.

A further object of this invention is to provide in a manner ashereinafter set forth, a wedge and split washer of special design andconstruction which allow the safety nut in which they are being used, tomaintain its locking position, not withstanding any wear of themechanical surfaces which are being united by this safety de.. vice, asonce this eccentric wedge or split washer have been displaced to theirlocking position, their improved design will keep locked indefinitely,until they have been voluntarily released.

A further object of this invention is to provide 'in a manner ashereinafter set forth, safety and eccentric wedges and split washerswhich, used in connection with improved safety nuts, provide a permanentjoint of the mechanical parts in which this safety non-loosening nut isbeing used, especially if said parts are subject to strenuous conditionor vibration, excessive wear or mechanical effort. and when a greatermargin of safety is needed.

Another object of this invention, is to provide in a manner ashereinafter set forth, eccentric wedges and split washer of improveddesign and construction, which make possible their use in connectionwith safety non-loosening nuts, without altering their exterior shapeand size, or the construction of the screw thread, thus providing asafety locking assembly of improved design which may be used onconventional bolts without the need of special tools or additionaldevices, in consideration of the relative position of the composingparts of said assembly, which provides a progressive and constantadjustment of said parts.

With these and other objects which may hereinafter appear, the inventionconsists in the iinproved design, construction, arrangement andcombination ofparts as will be more specifically ldescribed and`illustrated in the accompanying drawings, in which is shown anembodiment of the invention; but it is to be understood that changes,variations and modifications may be resorted to which fall withinthescope of the invention as claimed.

In the drawings,`

Figure 1 is an end view partly in section of a nut lock constructionaccording to the embodiment of this invention,

Figure 2 is a fragmental sectional view taken 'on line 2-2 of Figure 1,

Figure 3 is a fragmental sectional View taken on line 3-3 of Figure 1,

Figure 4 is a perspective view of the locking wedge,

Figure 5 is a perspective view of the wedge spring,

Figure 6 is a perspective View of a modified form of the locking wedge,

Figure 7 is a perspective-view of another modied formof the lockingwedge.

Referring to drawings and first to Figures l to 5 inclusive, the numerall5 designates generally a Vbolt having a nut IB threaded thereon. Inorder to provide a means whereby the nut I6 will be held against reverserotation, I have provided a nut lock, generally designated as Il. Thenut I6 is formed with an eccentric or cam recess i8 opening through theouter face thereof, and confronting of the threads of the bolt l5.

The nut lock l1 comprises an elongated longitudinally curved body I9which is formed with a truncated triangular thread engager 2D. The bodyI9 is a tapering or wedge lock conguration and the apex of the threadengaging portion 20 is formed with serrations or teeth 2l. The lockingmember 20 is truncated so that the apex thereof will be disposedoutwardly from the root 22 of the threads 23 of the bolt. In this mannerthe inner edge of the locking member 20 will at no time engage in thebottom of the root when it is in locking position. The teeth 2| areprovided so that the opposite ends thereof may bite into the sides ofthe thread during the wedging action.

The locking member VIl is constantly urged to locking position by meansof a bowed spring 24. The spring 24 is seated at one end in a recess 25formed in the large vend of the locking wedge or member Il and theopposite end of the spring 24 bears against the inclined wall 26 of therecess IB. This wall 26 is inclined to the longitudinal axis of the nutI6, being inclined outwardly and inwardly toward the axis so that thepressure of the spring 24 against the wall 26 will tend to retain thefree end of the spring Within the recess I8.

Referring now to Figure 6, there is disclosed a modified form of wedgelock 21 which is similar to wedge lock I1 with the exception that thetapered body 28 thereof is formed with a slot 29 disposed at rightangles with respect to slot 254 The spring 24 may be seated in the slot29 in the same manner as the spring 24 is seated in the slot 25. Inorder to provide a means whereby the wedge lock may be manually moved toreleased position, releasing lug 30 is carried by the. body 28 on itsouter side and is adapted tobev engaged by a tool for manually shiftingwedge member 21 toward the deep end of the eccentric Y,

or cam recess I8.

In Figure 7 there is disclosed another modifica-l tion of the lockingwedge generally designated as' l 3 I .Y This locking wedge 3i is formedwith a tapering body 32 similar to body I9, and also carries a truncatedtriangular locking portionY 33 formed with serrations 34 on the apexAthereof,'and body 32 is formed with a slot 35 similar to slot 29, andis also formed with a slot 36 which extends through the locking member33. In this manner the spring Zllmay be disposed in either one 0f theslots 35 or 36. A split releasing lug 31 is carried by the large end ofthe body 3 2Y and is'adapted by engagement of a-releasing tool formoving the Wedge lock to the large end of the cam or eccentric recess. Il

In the use and operation of this locking nut, the nut I6 may be rotatedin a clockwise direction so as to thread the nut on the bolt I5. vDuringthis threading operation the spring24vwill constantly push the wedgemember Il Vforwardly to the shallow end of recess I3,A but the frictionof the locking Wedge Il will tend to move this wedge'member in acounter-clockwise direction toward the large end of the recess I8.Inthis manner the nut I6 may be freely rotated to thread same on thebolt I5. However, reverse rotation of the nut I6 willbe prevented as-thespring 24 will push the wedge, I'I forwardly ina clockwise direction andthereby eiect the tight binding of the tapered sides of the lockingportion against the divergent sides of the threads`23.

What I claim is:

1. A nut lock comprising anut formed with a lof said recess and adaptedto normally resist movement of said wedge toward the large end of saidrecess, and a releasing lug extending laterally from the large end ofsaid wedge whereby said wedge may be forcibly moved against the tensionof said resilient member to released position.

'2. A nut lock comprising a nut formed with a cam-shaped recessextending from the threaded opening therein,.and a locking Wedgeengaging in said recess, said wedge being formed of a longitudinallyarcuate member having the configuration of a truncated V in transversesection and adapted to engage in the valley of a bolt thread, saidarcuate member including a tapered outer cam member, said Wedge having aslot in the large end thereof, and a resilient longitudinally bentYmember having one end thereof disposed in said slot and the other endabutting against the large end of said recess and adapted to normallyresist movement of said wedge toward the large end of said recess, saidouter cam member being formed with a lengthwise slot intersecting saidfirst named slot whereby to form a pair of resilient arms.

GUSTAVO VASQUEZ GLUMER.

REFERENCES CITED The following references are of record in the

